<template>
  <transition name="fly">
    <div v-show="showFlag" class="food" ref="food">
      <div class="food-content">
        <div class="image-header">
          <img :src="food.image" alt="">
          <div class="back" @click="hide">
            <i class="icon-arrow_lift"></i>
          </div>
        </div>
        <div class="content">
          <h1 class="title">{{food.name}}</h1>
          <div class="detail">
            <span class="sell-count">月售{{food.sellCount}}份</span>
            <span class="rating">好评率{{food.rating}}%</span>
          </div>
          <div class="price">
            <span class="now">￥{{food.price}}</span><span class="old" v-show="food.oldPrice">￥{{food.oldPrice}}</span>
          </div>
          <div class="cartcontrol-wrapper">
            <cartcontrol @add="addFood" :food="food"></cartcontrol>
          </div>
          <transition name="fade">
            <!--父元素监听子元素的add事件，并触发 addFood 事件-->
            <div @click.stop.prevent="addFirst" class="buy" v-show="!food.count || food.count===0">
              加入购物车
            </div>
          </transition>
        </div>
        <!--引入分割组件-->
        <split v-show="food.info"></split>
        <!--商品介绍-->
        <div class="info" v-show="food.info">
          <div class="title">商品信息</div>
          <p class="text">{{food.info}}</p>
        </div>
        <!--引入分割组件-->
        <split v-show="food.info"></split>
        <!--商品评价-->
        <div class="rating">
          <h1 class="title">商品评价</h1>
          <ratingselect
            :select-type="selectType"
            :only-content="onlyContent"
            :desc="desc"
            :ratings="food.ratings"
            @select="selectRating"
            @onlyContent="toggleContent1"></ratingselect>
          <div class="rating-wrapper">
            <!--有评价-->
            <ul v-show="food.ratings && food.ratings.length">
              <!--列表过滤-->
              <li v-show="needShow(rating.rateType,rating.text)" v-for="rating in food.ratings" class="rating-item">
                <div class="user">
                  <span class="name">{{rating.username}}</span>
                  <img :src="rating.avatar" class="avatar" width="12" height="12" alt="">
                </div>
                <div class="time">{{rating.rateTime | formatDate}}</div>
                <p class="text">
                  <span :class="{'icon-thumb_up':rating.rateType===0,'icon-thumb_down':rating.rateType===1}">{{rating.text}}</span>
                </p>
              </li>
            </ul>
            <!--暂无评价-->
            <div class="no-rating" v-show="!food.ratings || !food.ratings.length">暂无评价</div>
          </div>
        </div>
      </div>
    </div>
  </transition>

</template>

<script>
  //引入BScroll 滚动插件
  import BScroll from 'better-scroll'
  //引入购物车组件
  import cartcontrol from "../cartcontrol/cartcontrol"
  //引入分割组件
  import split from "../split/split"
  //引入ratingselect商品评价组件
  import ratingselect from '../ratingselect/ratingselect'
//引入时间戳转换年月日，时分秒格式(export fun  则带{} export default 不用带{})
  import {formatDate} from "../../common/js/date";

  const POSITIVE=0;
  const NEGATIVE=1;
  const ALL=2;
  export default {
    props:{
      food:{
        type:Object
      },
    },
    data(){
      return{
        showFlag:false,
        selectType:ALL,
        onlyContent:true,
        desc:{
          all:'全部',
          positive:"推荐",
          negative:"吐槽"
        }
      }
    },
    methods:{
      //显示浮层
      show(){//当外部可以调用用show()命名，如果是私有的则_show()
        this.selectType=ALL;
        this.onlyContent=false;
        this.showFlag=true;
        this.$nextTick(()=>{
          if(!this.scroll){
            this.scroll=new BScroll(this.$refs.food,{
              click:true
            })
          }else{
            this.scroll.refresh();//重新做一次计算
          }
        })
      },
      //隐藏浮层
      hide(){
        this.showFlag=false
      },
      //添加food 购物车动画小球  需要在父组件上添加@add=addFood()
      addFood(target){
        //当前组件必须在父组件 引入处，bangding @add="xxx",继而执行 父组件的 xxx 方法
        this.$emit('add',target);
      },
      //添加第一个商品
      addFirst(event){
        if(!event._constructed) return;
        this.$emit('add', event.target);
        this.$set(this.food,'count',1);
      },
      //子组件选择评价类别 向父组件传递的 type 值
      selectRating(type){//改变type值
        this.selectType = type; //data里面值
        this.$nextTick(()=> {
          this.scroll.refresh();//重新计算来确保滚动效果的正常
        })
      },
      toggleContent1(onlyContent){
        const _this=this;
        _this.onlyContent=!this.onlyContent;
        _this.$nextTick(()=> {//异步更新（确保dom 全部更新完毕）
          this.scroll.refresh();//重新计算来确保滚动效果的正常
        })
      },
      //点击按钮关联评价列表
      needShow(type,text){
        //只有内容且只有内容（关联按钮）
        if(this.onlyContent && !text){
          return false
        }
        //如果当前点击的是全部则展示出列表
        if(this.selectType===ALL){
          return true
        }else{
          return type===this.selectType;
        }

      }
    },
    //过滤时间戳
    filters:{
      formatDate(time){
        let date=new Date(time);
        return formatDate(date,"yyyy-MM-dd hh:mm:ss");
      }
    },
    components:{
      cartcontrol,
      split,
      ratingselect
    }
  };
</script>

<style lang="stylus" rel="stylesheet/stylus">
  @import "../../common/stylus/mixin.styl"
  .food
    position: fixed
    left: 0
    top: 0
    bottom: 48px
    z-index: 30
    width: 100%
    background: #fff
    &.fly-enter-active, &.fly-leave-active
      transition: all 0.2s linear
    &.fly-enter, &.fly-leave-active
      transform: translate3d(100%, 0, 0)
    .image-header
      position: relative
      width: 100%
      height: 0
      padding-top: 100%
      img
        position: absolute
        top: 0
        left: 0
        width: 100%
        height: 100%
      .back
        position: absolute
        top: 10px
        left: 0
        .icon-arrow_lift
          display: block
          padding: 10px
          font-size: 20px
          color: #fff

    .content
      position: relative
      padding: 18px
      .title
        line-height: 14px
        margin-bottom: 8px
        font-size: 14px
        font-weight: 700
        color: rgb(7, 17, 27)
      .detail
        margin-bottom: 18px
        line-height: 10px
        height: 10px
        font-size: 0
        .sell-count, .rating
          font-size: 10px
          color: rgb(147, 153, 159)
        .sell-count
          margin-right: 12px
      .price
        font-weight: 700
        line-height: 24px
        .now
          margin-right: 8px
          font-size: 14px
          color: rgb(240, 20, 20)
        .old
          text-decoration: line-through
          font-size: 10px
          color: rgb(147, 153, 159)
      .cartcontrol-wrapper
        position: absolute
        right: 12px
        bottom: 12px
      .buy
        position: absolute;
        right: 8px;
        bottom: 12px;
        z-index: 10;
        height: 28px;
        line-height: 28px;
        padding: 0 13px;
        -webkit-box-sizing: border-box;
        box-sizing: border-box;
        border-radius: 14px;
        font-size: 10px;
        color: #fff;
        background: #00a0dc;
        opacity: 1;
        &.fade-enter-active, &.fade-leave-active {
          transition: all 1s
        }
        &.fade-enter, &.fade-leave-active {
          opacity: 0
          z-index: -1
        }
    .info
      padding: 18px
      .title
        line-height: 14px
        margin-bottom: 6px
        font-size: 16px
        color: rgb(7, 17, 27)
      .text
        line-height: 24px
        padding: 0 8px
        font-size: 12px
        color: rgb(77, 85, 93)
    .rating
      padding-top: 18px
      .title
        line-height: 14px
        margin-left: 18px
        font-size: 14px
        color: rgb(7, 17, 27)
      .rating-wrapper
        padding: 0 18px
        .rating-item
          position: relative
          padding: 16px 0
          border-1px(rgba(7, 17, 27, 0.1))
          .user
            position: absolute
            right: 0
            top: 16px
            line-height: 12px
            font-size: 0
            .name
              display: inline-block
              margin-right: 6px
              vertical-align: top
              font-size: 10px
              color: rgb(147, 153, 159)
            .avatar
              border-radius: 50%
          .time
            margin-bottom: 6px
            line-height: 12px
            font-size: 10px
            color: rgb(147, 153, 159)
          .text
            line-height: 16px
            font-size: 12px
            color: rgb(7, 17, 27)
            .icon-thumb_up, .icon-thumb_down
              margin-right: 4px
              line-height: 16px
              font-size: 12px
            .icon-thumb_up
              color: rgb(0, 160, 220)
            .icon-thumb_down
              color: rgb(147, 153, 159)
        .no-rating
          padding: 16px 0
          font-size: 12px
          color: rgb(147, 153, 159)
</style>
